Telephone system.



0. 0. DENNIS. TELEPHONE SYSTEM.-

APPLIOATIOH FILED OUT. 29, 1904. l I

Patented Aug. 2, 1910.

21 216. Illa-m di J 17 6401402 J Zis Jiiibrngy 1n: NORRIS PITIR: 6a., WABHINGTBI'I, n. C.

UNITEDSTATES PATENT OFFICE p oLIv nnoLDniiNIsNon;onrcneo, IL InoIs.

I TELEPHONESYSTEM.

965,876. i i c t o e n Patented Aug.2, 1910. i y. Application filedjoctober 29,1904. Serial no. 230,475

y c to beshifted by andshift the core. The

Be it known that I, OLIVER 0.;DENNIS, a armature is provided with studs at of inresident of Chicago, in thecounty of Cook sulating material whereby the resilient and State of Illinois, haveinventedcertain 1 switch members are respectively operated.

a 5 newanol usefullmprovements in Telephone The core is normally centralized by the re 60 Systems, of which the following is a full, 1 silient switchanembers. One portion thereclear, and exact description. i 1 lfj i ofserves as an armature for the helix B The invention relates to telephone-sys and the other servesas an armature for the tems and moreparticularly to the-1n -1ans helix C. The helices B and C are dif- '10 for controlling the line-signa'l andthe Iferentially wound or connectedsothatpas- 65 cutout switch for eliminating thelinesage ofcnrrent through one coil will op,- signal when theexchange-operator responds crate the armature in one direction while -to a call. l y i energization of the other coil will operate The inventiondesignsto provide an imthe armatures in the opposite direction.

c l v dtelephone system embodying a self This differential operation is obtained by '70 contained or composite irelay comprising passageof current inopposite direction or i To all whom d mer concern:

\ both the line-signal and cut out switchesso -by reversal ofthe helixwindings, as well in the equipment of an exchange they are; understood in the art. i bi d d mb mounted conveniently The operation of the relay will beias telith o yf pa i 1 lows: When the coil C isenergizedby pas- 7 5 With these o'bgects in View, the invention 3 sage of current therethrougln armature D i t i ,1 th al no el i pr ements will be: shiftedoutwardly in direction to h i aft et fo th and more particularly operate switch H, the magnetic path resultdefined by claims at the conclusion hereof. 3 ing therefrom will be through armature D, o

In the drawings:- Figure 1 is a'perspective 5 diske', jacket E and cap. 0 as indicated in of the improved relay employed in the tele; i Fig. 2,;thns effecting outward; movement phone system. Fig. Qjisa centrallongitw j ofiarmature Dlin proper direction to opdinal section. Fig. 3is a similar 'view, show 1 i SWiECh Hr W n id h lix is deing the armature and switch at o-ne end of energized, a resilient member h Will 30 the relay, in shiftedposition; Fig. "4 is a store the armature to its normal centralized 85 i ila :vi h wing the switch at theother position. When heliX B is energized, the end in shifted position. Figffilis a diagrammagnetic path will bethrough armature D, matic view of a telephone system embodying disk 6, jacket E1 and cap 6, as indicated in the improved apparatus; Fig.6 is a dia 5 Fig. 2, thus effecting outward movement of m ti i w of th -swi e ofit l y armature D inproper directionto operate 90 phone systemhaving the improved appaswltch G; When said helixis denerigized, ratus associated-therewith. l resilient ends 9 and 9 0f switch-members A denotes a relay-comprisinga helix B 1' g and 9* respectively will restorethe armaand a helix G, Within which is slidably ture to itsnormalcentralized position. 40 guided a core I), a jacket E andcaps b and i In Fig. 5 the iinprovedrelay isassociated 95 c and a central disk on pole-piece eg In- -with a telephone-system to operateia.linesulating ends I)" andc arerespjectivelyan signal 3 switch H and a cut-out switch ranged at the outer end of? helices Band j Gto perform the functions ordinarily per- C. Thecaps,core,diskand jacket are jmadei formed in systems now in general use by g; of iron to provide paths for tlie magnetic 1 "the cut-out? relay and the l1ne-relay. One 100 flux resulting from both: helices; Gore D ofthe objects of theinvention isto provide is guided in tube dand is adapted to operate {single relay susceptible ofluse 1n lieu a switch G atoneend ofthe relay and a ofbothofthe said relays. The system comswitch H xat the otheryend otthe relay. prises a cord-loop J and associatedbattery SWitchGr comprises members 9, g? and ZOQsvVitch-pIugs 21 and 22, supervisory-sig- 1 5 9 Members g each have aresilient rials 23, supervisory-relays 2t and switches portionadapted to be shiftedby, and ,0 f 25 controlledby said relays. The switchshift the core. Switch H comprises ine boardlicomprises a springjack tand assobers h and jh whichare normally contact oiated therewith is a line sig nal 30, for a I telephone-line comprising conductors 31 and 1 Member it has a resilient portion adapted 32 and extending to a substation K which is provided with the usual telephone equipment. Such a system is of the type commonly known as a three-way system, as

which is connected by wire 34 to the other switch member h of the line: signal switch. Helix C is included in a conductor .35 connected to conductor 34 which is connected to battery 20 and conductor 34 is connected to switch member 9 of the cutout switch G. The cut-out switch comprises a member 9 normally in contact with member 9. and connected to line-conductor 32 by a conductor 33. Helix B is included in a conductor 36 connected to sleeve-thimble i of spring-jack i and to conductor 34 which leads to battery 20. Switch member g is connected to line-conductor 31 and is normally in contact with a switch-member g connected by conductor 38 to conductor 36. Conductors 36 and 34 are connected to ground 39. It will be understood that the cord-circuit and the line circuit are supplied with potential from a common source as well understood in the art, batteries 20 and'2 O being shown for clearness of illustration.

The operation of the telephone system including the improved relay for operating the cut-out and the line-signal as shown in Fig. 5 will be as follows: Vhen the telephone at sub-station K is removed from the switch-hook thereat, an electric circuit for switch H to'close the local linesignal circuit will be established from battery 20, conductor 34, helix 0, switch-members g, g, conductor 33, line-conductor 32 to the sub-station K, thence through lineconductor 31, switch-members g and g and conductors 38 and 36 to battery 20. Thereupon helix C will be energized in such manner thatswitch-member 72/ will be shifted by armature D into contact with switchmember if and thus establish a local circuit for line-signal as follows: Battery 20, conductor 34, switch-members h and 72?, conductor 30 in which line-signal 30 is included to battery 20. Switch H will be held in shifted position while current passes through helix C until the exchange-operator inserts a switch-plug into a spring-jack of switch-board I. Then helix B will be energized to operate the cut-out switch by establishment of a circuit as follows: battery 20, conductor 40 to sleeve 41 of switch plug .21," sle'eve-thimbl e z' conductor 36 (in which helix B is included), conductor 34 to'ground and battery 20." Thereupon armature D of the" relay will be operated in reverse direction and switch-members g' and 9 will be separated from their associated contacts. Thereupon the line-switch will be restored to break the local circuit for the line-signal at switch-members h and If, and the cut-out switch will be in open position to interrupt the signaling circuit in which helix 0 is included and the cutout switch will disconnect the relay from the telephone-line so the line will be clear for speech transmission. So long as plug 21 remains in spring-jack i helix B of the relay will be energized so the relay will be disconnected from the telephone-line.

In Fig. 6 there is illustrated diagrammatically a telephone system commonly known as a two-way circuit having the improved relay associated therewith for controlling the line-signal and the cut-out therefor. Said system comprises a cord-loop J a switch-board I, line conductors 31 and 32, battery 20 and sub-station K. In the said system the local circuit for the operation of the line-signal is similar to that already described. Battery 20 is connected by conductors and 51 with switch-members 7L and g respectively. Helix C is included in a conductor 52 connected to the line-conductor 31 and to a contact 9 normally in contact with switch-member g of cut-out switch G. Helix B is included in a conductor 54 connected to line-conductor 32 and to conductor 34. The operation of said system will be as follows: When the receiver is removed from the switch-hook at sub-station K a circuit for closing the local line-signal will be as follows: battery 20, conductors 34, 51,sWitch-members g and g, conductor 52 in which helix C is included, line-conductor 31, sub-station K, line-conductor 32, conductor 54 in which helix B is included and conductor 34 to battery 20. In this form of the invention helix C will be wound so it will have a higher resistance, 6. 9., 500 ohms and helix B will be differentially wound and of lower resistance, 6. 9., 150 ohms. Therefore said circuit will energize the relay so armature D will be operated to close switch H at switch-members 72, and ha. The current which passes through the helix B is from the sub-station and is not of suflicient amperage to cause the armature D to be influenced by coil B against the opposing influence of helix C. Resultantly switch H will be closed. The local circuit for the line-signal ,30 will be rendered operative so long as such conditions continue, and until the exchange-operator inserts plug 21 into the spring-jack in response to the call. Then circuit will be established as follows: battery 20, conductor 55, the contact-sleeve of plug 21, the sleevethimble of spring-jack i line-conductor 32 to conductor 54 in which helix B is included, thence by conductor 34 to battery 520'. Current passing throu h B under such conditions will energize said helix and overcome the influence of helix O upon armature D and shift said armature to operate cut-out switch G into open position;

both be denergized, and the resilient switch-' members will restore the armature to normal position.

Manifestly the improved relay can be usedto advantage in operating switches forpurposes other than thosespecifically set forth.

The invention is not to be understood as restricted to the details described, but may be modified without departing from the spirit and scope of the invention.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a telephone-system, the combination of a combined relay comprising a line-signal switch, a cut-out switch and a pair ofinductively opposed helices for respectively operating said switches, a line-signal actuation of which is controlled by said line-signal switch, switch-shifting means operated by the helices in different directions respectively, and suitable means and connections for energizing the helix for operating said] line-signal switch when a subscriber makes a call and for energizing the helix for thecut-out switch when the exchange-operator makes a connection with the sub-station in response to a call.

2. In a telephone-system, the combination of a combined solenoidal relay comprising a line-signal switch, a cut-out switch, and a pair of inductively opposed helices for respectively operating said switches, a linesignal actuation of which is controlled by said line-signal switch, switch-shifting means within the helices and operated in difierent directions by the helices respectively, and suitable means and connections for energizing the helix for operating said line-signal switch when a subscriber makes a call and for energizing the helix for the cut-out switch when the exchange-operator makes a connection with the substation in response to a call.

3. In a telephone-system, the combination of a combined relay comprising a pair of helices, a switch-operating armature, a linesignal switch, a cut-out switch for the linesignal, said switches being respectively op erated by said helices in opposite directions, a line-signal controlled by said line-signal switch, and suitable means and connections for energizing the helix for operating said line-signal switch when a subscriber makes teams n 8 operator makes a connection with the substation in response to a call.

4. In a teleplionesysteni, the combination of a combined relay comprising a linesignal switch, a cutout switch, a plurality of helices, and an armature within one of the helices and operated in diiferent directions by the helices to operate both of the switches respectively, and suitable means and connections forenergizing the helix for operating said line-switch when a subscriber makes a call and for energizing the helix,

for operating the cut-out switch when the exchange operator makes a connection with the sub-station in response to a call.

5. In a telephone-system, the combination of: a combined relay comprising a li11e-.

signal "switch, a cut-out switch, a pair ofhelices and an armature operated in opposite directions by the helices respectively and for operating the switches respectively, and suitable means and connections for energizing the helix for operating said lineswitch when a subscriber makes a call and for energizing the helix for operating the cutout switch when the exchange operator makes a connection with the sub-station in response to a call.

6. In a telephonesystem, the combination of a combined relay comprising a linesignal switch, a cut-out switch, a pair of helices, a jacket forming the magnetic field for both of the helices, a pole-piece be tween the helices, and an armature core within one of the helices, and suitable means and connections for energizingthe helix for operating said line-switch when a, subscriber makes a call and for energizingthe helix for operating the cut-out switch when the exchange operator makes a connection with the sub-station in response to a call.

7. In a telephone-system, the" combination of a combined relay comprising a linesignal switch, a cutout switch, a pair of helices, a jacket forming the magnetic field for both of the helices, a pole-piece between the helices and a spring-held armature-core within one of the helices, and

suitable means and connections for energizing the helix for operating said lineswitch when a subscriber makes a call and for energizing the helix for operating the cut-out switch when the exchange operator makes a connection with the sub-station in response to a call.

8. In a telephone-system, the combination of a combined relay'comprising a linesignal switch, a cut-out switch, and an electro-magnet for operating said switches comprising diiterential helices, SWltCl1-Sl1lfting means operated in different directions by the helices respectively, and suitable means and connections for energizing the helix for operating said line-switch when a subscriber makes a call and for energizing the helix for operating the cut-outswitch when the exchange operator makes a connection with the sub-station in response to a call.

9. In a telephone-system, the combination ofa combined relay comprising a linesignal switch, a cut-out switch, and differential helices, switch-shifting means operated in different directions by the helices respectively, the helix for the cut-out switch being of such resistance that current passing therethrough from the telephone line will not cause the operation of the latter switch, and suitable means and connections for energizing the helix for operating said line-switch when a subscriber makes a call and for energizing the helix for operating the cut-out switch when the exchange operator makes a connection with the sub-station in response to a call.

10. In a telephone-system, the combination of a combined relay comprising a linesignal switch, a cut-out switch, an armature, and a pair of differential helices, switchshifting means operated in diflerent directions by the helices respectively whereby the line-signal switch will be operated by current in one of the helices and when current from the telephone-line passes through the other helix, and suitable means and connections for energizing the helix for operating said lineswitch when a subscriber makes a call and for energizing the helix for operating the cut-out switch when the exchange operator makes a connection wit-h the substation in response to a, call.

11. In a telephone system, the combination of a relay comprising a line-signal switch, a cut-out switch, a pair of helices for operating said switches respectively, a common jacket around both of said helices, said switches being'mounted at the ends ofthe jacket, and suitable means and connections for energizing the helix for operating said line switch when a subscriber makes a call and for energizing the helix for operating the cut-out switch when the exchange operator makes a connection with the substation in response to a call.

12. In a telephone system, the combination of a relay comprising a pair of helices, a common armature core for both of said helices and operated in opposite directions by the helices respectively, a linesignal switch, and a cut-out switch respectively operated by the core, and suitable means and connections for energizing the helix for operating said line-switch when a subscriber makes a call and for energizing the helix for operating the cut-out switch when the exchange operator makes a connection with the sub-station in response to a call.

13. In a telephone system, the combination of a relay comprising a jacket, caps at the ends of said jacket, a pair of helices within the jacket, a line-signal switch, and a cut-out switch respectively operated responsively to the helices, switch-shifting means within the helices and operated in different directions by the helices respectively, and suitable means and connections for energizing the helix for operating the line-switch when a subscriber makes a call and for energizing the helix for operating the cut-out switch when the exchange-operator makes a connection with the substation in response to a call.

OLIVER C. DENNIS.

Witnesses:

FRED GnRLAoH, LEONE S. RUssELL. 

